CN202468152U

CN202468152U - Cycloid hydraulic motor rotor and stator pair with sealing structure

Info

Publication number: CN202468152U
Application number: CN2012200751562U
Authority: CN
Inventors: 张凯; 李琳桦; 史庆国; 何平
Original assignee: HUAITE (CHINA) DRIVING PRODUCT CO Ltd
Current assignee: Danfoss Power Solutions Jiangsu Co Ltd
Priority date: 2012-03-02
Filing date: 2012-03-02
Publication date: 2012-10-03
Anticipated expiration: 2022-03-02

Abstract

The utility model discloses a cycloid hydraulic motor rotor and stator pair with a sealing structure. The cycloid hydraulic motor rotor and stator pair comprises a rotor and a stator, wherein the rotor and stator pair is arranged between a motor rear cover and an isolation disk; a rotor axial clearance and a stator axial clearance are formed between the rotor and stator pair and the rear cover; a sealing trench is formed on the end face of the rotor, which is closed to the rear cover; and a sealing ring is arranged in the sealing trench and in interference fit with the inner side of the sealing trench. The cycloid hydraulic motor rotor and stator pair has the advantages that the sealing structure is arranged on the end face of the rotor, which is closed to the rear cover; when hydraulic oil enters the bottom of the sealing trench through the rotor axial clearance and the stator axial clearance from a high-pressure cavity, the sealing ring is jacked and tightly attached to the rear cover to form a seal, so that flow of the hydraulic oil, which is produced among the rotor, the rear cover, the isolation disk and the stator from the high-pressure cavity to a low-pressure cavity, is cut off, and internal leakage is reduced; and furthermore, the axial sealing property of the rotor and stator pair is guaranteed, the requirement of the axial clearances on the machining precision is reduced, and particularly, the motor can normally run when working at low speed and high pressure, and the performance of the motor is guaranteed.

Description

Cycloid hydraulic motor with sealing configuration changes the stator pair

Technical field

It is secondary that the utility model relates to a kind of commentaries on classics stator, and it is secondary that particularly a kind of cycloid hydraulic motor with sealing configuration changes stator.

Background technique

Shown in accompanying drawing 1; When the rotor 1 of cycloid hydraulic motor rotates in stator 2 inner chambers, promptly prevent hydraulic oil rotor 1 and bonnet 5, flowing between dish 6, stator 2 in order to guarantee end face seal, and guarantee that rotor rotation is flexible; Between rotor and the stator certain axial clearance H must be arranged; But this axial clearance H is required very strict, the gap too greatly then during the work of motor low speed heavy pressure hydraulic oil flow to low pressure chamber 4 by hyperbaric chamber 3, internal leakage is big, volumetric efficiency is poor; The little then rotor rotation in gap is involved and abstruse, and mechanical resistance increases, and mechanical efficiency is low, even rotor can't rotate in bore of stator, causes motor not work.The axial clearance H that guarantees to process is in scope of design; Then require commentaries on classics, the paired match grinding of stator; Need high precision face grinder, its cost of equipment and processing charges are all very high, even processing can guarantee such tolerance clearance; Still can some internal leakage produce, motor is when low speed heavy pressure is worked even can not work.

The model utility content

The model utility purpose: to the problems referred to above, the purpose of the utility model provides a kind of cycloid hydraulic motor with sealing configuration changes the stator pair, can guarantee to change the secondary axial seal property of stator, can reduce the cooperation requirement of axial clearance again.

Technological scheme: it is secondary that a kind of cycloid hydraulic motor with sealing configuration changes stator; Comprise rotor, stator; Change the stator pair place the motor bonnet with between coiling and and bonnet between have commentaries on classics, stator shaft orientation gap; Said rotor is offered sealed groove near the end face of bonnet, and seal ring is installed in the said sealed groove, the inboard interference fit of said seal ring and said sealed groove.

It is between the maximum cylindrical of said rotor epicycloid recess incircle and involute inner spline that said sealed groove is offered the position; This position is the transition region between motor hyperbaric chamber and the low pressure chamber, is to prevent that hydraulic oil from cutting off position through axial clearance to the best that low pressure chamber flows by hyperbaric chamber.

Beneficial effect: compared with prior art; The utility model has the advantages that at rotor sealing configuration to be set near the end face of bonnet, when hydraulic oil by hyperbaric chamber through changeing, when the stator shaft orientation gap gets into the sealed groove bottom, seal ring jack-up and bonnet being adjacent to; Form sealing; Cut off hydraulic oil and flow to low pressure chamber, reduce internal leakage, guaranteed to change the secondary axial seal property of stator at rotor and bonnet, the hyperbaric chamber that between dish, stator, produces; Reduce the requirement on machining accuracy of axial clearance, normal operation and performance when especially guaranteeing the work of motor low speed heavy pressure.

Description of drawings

Fig. 1 changes the secondary assembling of stator for existing technology and partly cuts open structural drawing;

Fig. 2 partly cuts open structural drawing for the utility model changes the secondary assembling of stator;

Fig. 3 is the partial enlarged view I of Fig. 2.

Embodiment

Below in conjunction with accompanying drawing and specific embodiment; Further illustrate the utility model; Should understand these embodiments only be used to the utility model is described and be not used in the restriction the utility model scope; After having read the utility model, those skilled in the art all fall within the application's accompanying claims institute restricted portion to the modification of the various equivalent form of values of the utility model.

Like accompanying drawing 2, shown in 3; It is secondary that a kind of cycloid hydraulic motor with sealing configuration changes stator; Comprise rotor 1, stator 2, change the stator pair place motor bonnet 5 with between coiling 6 and and bonnet 5 between have certain commentaries on classics, stator shaft orientation gap H, offer sealed groove 3 at rotor 1 near the end face of bonnet 5; And seal ring 4 is installed in sealed groove 3, seal ring 4 and sealed groove 3 inboard interference fit.The position of offering of sealed groove 3 is that this position is the transition region between motor hyperbaric chamber 7 and the low pressure chamber 8 between the maximum cylindrical of rotor 1 epicycloid recess incircle and involute inner spline.

Hydraulic oil through changeing, when stator shaft orientation gap H gets into sealed groove 3 bottoms, seal ring 4 jack-up and bonnet 5 being adjacent to, forms sealing by hyperbaric chamber 7, and it is mobile to low pressure chamber at rotor 1 and bonnet 5, the hyperbaric chamber that between dish 6, stator 2, produces to cut off hydraulic oil.

Claims

1. the cycloid hydraulic motor with sealing configuration changes the stator pair; Comprise rotor (1), stator (2); Change the stator pair place the motor bonnet with between coiling and and bonnet between have commentaries on classics, stator shaft orientation gap; It is characterized in that: said rotor (1) is offered sealed groove (3) near the end face of bonnet, and seal ring (4), said seal ring (4) and the inboard interference fit of said sealed groove (3) are installed in the said sealed groove (3).

2. it is secondary that the cycloid hydraulic motor with sealing configuration according to claim 1 changes stator, it is characterized in that: it is between the maximum cylindrical of said rotor (1) epicycloid recess incircle and involute inner spline that said sealed groove (3) is offered the position.